Local cohomology modules of a smooth Z-algebra have finitely many associated primes
classification
🧮 math.AC
math.AG
keywords
cohomologylocalassociatedfinitelymanymodulessmoothalgebra
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Let $R$ be a commutative Noetherian ring that is a smooth $\mathbb Z$-algebra. For each ideal $I$ of $R$ and integer $k$, we prove that the local cohomology module $H^k_I(R)$ has finitely many associated prime ideals. This settles a crucial outstanding case of a conjecture of Lyubeznik asserting this finiteness for local cohomology modules of all regular rings.
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